Supernumerary rainbows
Taken by Anne Mette Sannes on September 11, 2016 @
Jevnaker, Norway
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Details:
Normally we see a primary six-colored rainbow, but sometimes it’s also possible to see a secondary rainbow outside the primary. But inside the primary was even more!
This is a rare phenomenon called supernumerary rainbows or supernumerary bands also known as stacker rainbows. Such supernumerary rainbows are located close to the primary and have pastel colors. The phenomenon is caused by droplets 1 mm or smaller.
Supernumerary rainbows cannot be explained using classical, geometric optics, but is due to interference between rays of light with slightly different directions within the droplets.
Supernumerary rainbows have been important for science since they were the first indication for the wave nature of light.
My husband and I observed the phenomenon Saturday evening from our home at Jevnaker - one hour north of Oslo.
(10.30 pm local time).
(The pictures are slightly enhanced)
Cannon Power Shot SX60 HS
Photographer's website:
http://www.astroevents.no/regnbue090716.html
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